I've followed the instructions for BasiliskII on my Mac to a T and am able to get the installer parts files in the Unix disk but i'm running into an error there. I am able to copy the files in the unix disk but unable to paste them into the installerparts disk, so I cannot get to the next step.

Copy/paste of files is a windows-ism. It wasn't implemented on Macs until OS X. For Classic Mac OS, you copy files not via the clipboard, but by clicking on the file and dragging it to the desired destination.